CN103533376B - Method and apparatus for motion information processing of interframe prediction coding, and coding and decoding system - Google Patents

Abstract

Embodiments of the present invention provide a processing method, device, and codec system for motion information of inter-frame predictive coding, so as to increase the speed of parsing code streams. The method includes: determining the currently used reference frame list and the motion information of the matching block that needs to be transmitted in the used reference frame list according to the value of the syntax element; if the currently used reference frame list and the used reference frame list need to be transmitted If the motion information of the matching block is determined, then write the motion vector predictor identifier of the matching block in the determined reference frame list prior to the motion vector difference related information of the matching block in the determined reference frame list stream. The present invention enables the decoder side to process these information in parallel, that is, while analyzing the motion vector difference related information, the motion vector prediction value can be obtained by decoding according to the analyzed motion vector prediction value identification, thereby improving the decoding speed of the code stream at the decoder side .

Description

Processing method, device and codec system for motion information of inter-frame predictive coding

technical field

The present invention relates to the field of image processing, in particular to a processing method, device and codec system for motion information of inter-frame predictive coding.

Background technique

Existing video image coding and decoding technologies include intra-frame predictive coding and inter-frame predictive coding, wherein inter-frame predictive coding refers to compressing and coding the current coded image by using the time correlation between the current coded image and the coded image. In H.264/AVC, a frame of image is divided into several square image blocks. Search out the image block that matches the current image block from the coded reference frame, and calculate the relative offset of the spatial position between the current block and the matching block, which is the motion vector (Motion Vector, MV), and get The process of motion vector is called motion estimation (Motion Estimation, ME), and the process of using the matching block to predict the current image block is called motion compensation (Motion Compensation, MC). The difference between the pixel value of the current image block and the matching block It is called the image block prediction residual.

In order to make the matching blocks used by the decoder side and the encoder side the same, the motion information of the image blocks used by the encoder side needs to be transmitted to the decoder side in the code stream. If the motion vector of each image block is coded directly, it will consume a large number of bits, especially when small-sized image blocks occupy the majority. Since a moving object often covers multiple image blocks, the motion vectors of adjacent image blocks in the space domain have a strong correlation. Therefore, the motion vector of the current image block can be predicted according to the motion vector of the adjacent coded image block, and the predicted value is called the motion vector predictor (motion vector predictor, MVP), the motion vector of the current image block and the motion vector The difference between the predicted values is called the motion vector difference (Motion Vector Difference, MVD), that is, there is a relationship: MV=MVD+MVP.

As a new video coding standard, H.264 uses multi-reference frame prediction in the motion estimation process to improve the prediction accuracy, that is, it establishes a buffer to store multiple reconstructed image frames, and in all the reconstructed image frames in the cache Find the optimal matching block for motion compensation, so as to better remove the redundancy in the time domain. H． 264 inter-frame predictive encoding uses two buffers as above, namely reference frame list 0 (reference list0) and reference frame list 1 (reference list 1). The reference frame where the best matching block in each list is located is marked with index values, namely ref_l0_idx and ref_l1_idx. Taking reference frame list 0 as an example, the motion information of the matched blocks in this list includes reference frame index value (ref_l0_idx), motion vector predictor value (MVP) and motion vector difference (MVD). Based on these three pieces of information, the decoder side can find the correct matching block in the selected reference frame.

An inter-frame predictive encoding motion information processing method provided by the prior art is to use H.264/AVC as the video image compression standard, and use macroblocks (16x16 pixel size) as the basic unit of encoding processing. , a macroblock can contain one or more motion blocks, but any motion block is a rectangular block. The reference frame list value, reference frame index value and motion vector difference of these motion blocks will be transmitted or decoded in units of macroblocks. Since the selection method of the motion vector predictor (MVP) in H.264/AVC is uniquely determined, the relevant information of the MVP does not need to be transmitted in the code stream. Specifically, at the encoder side, the selection of the reference frame list of the macroblock is first transmitted, that is, when reference frame list 0 is used, the motion information is coded and transmitted in the following order: sequentially transmit all motion blocks in the macroblock in the reference frame list The reference frame index value ref_idx_l0 used in 0; sequentially transmit the motion vector difference mvd_l0 of all motion blocks in the macroblock in the reference frame list 0. When using reference frame list 1, the motion information is coded and transmitted in the following order: sequentially transmit the reference frame index value ref_idx_l1 used by all motion blocks in the macroblock in reference frame list 1; sequentially transmit all motion blocks in the macroblock in the reference frame list 1 in the motion vector difference mvd_l1. On the decoder side, when reference frame list 0 is used, the motion information is decoded in the following order: sequentially decode the reference frame index value ref_idx_l0 used in reference frame list 0 for all motion blocks in the macroblock; sequentially decode all motion blocks in the macroblock The block has a motion vector difference mvd_l0 in reference frame list 0. When using reference frame list 1, the motion information is decoded in the following order: sequentially decode the reference frame index value ref_idx_l1 of all motion blocks in the macroblock in reference frame list 1; sequentially decode all motion blocks in the macroblock in reference frame list 1 Medium motion vector difference mvd_l1. The decoder side and the encoder side use the same method to select and derive the motion vector predictor MVP of the current image block.

At the decoder side, each motion block in the macroblock can determine the reference frame where the matching block of each motion block is located according to the reference frame list and reference frame index value parsed in the code stream; each motion block in the macroblock is based on the code The motion vector difference (for example, mvd_l0) of a certain list (for example, reference frame list 0) parsed in the stream is added to the motion vector predictor derived by the decoder to calculate the motion vector (for example, mv_l0) , so as to determine the spatial position of the matching block in the list, and obtain the required matching block.

However, the method for processing motion information of inter-frame predictive coding provided by the above-mentioned prior art has the disadvantage that, since the selection method of the motion vector predictor is unique, the motion vector predictor obtained at the decoder side may not necessarily be the best choice for the current image block. In addition, the decoder side is not processed in parallel, and the decoding speed is not high.

Contents of the invention

Embodiments of the present invention provide a processing method, device, and codec system for motion information of inter-frame predictive coding, so as to increase the speed of parsing code streams.

An embodiment of the present invention provides a method for processing inter-frame predictive coding motion information, the method comprising: determining the currently used reference frame list and the motion information of a matching block to be transmitted in the used reference frame list according to the value of the syntax element, The reference frame list includes at least one of reference frame list 0 and reference frame list 1, and the motion information includes reference frame index value, motion vector predictor identifier and motion vector difference related information; if the currently used reference frame list and the If the motion information of the matching block to be transmitted in the reference frame list used is determined, then the motion vector predictor of the matching block in the determined reference frame list used is identified prior to the matching block in the determined reference frame list used The related information of the motion vector difference is written into the code stream.

An embodiment of the present invention provides a method for processing inter-frame predictive coding motion information, the method comprising: determining the currently used reference frame list and the motion information of a matching block to be parsed in the used reference frame list according to the value of the syntax element, The reference frame list includes at least one of reference frame list 0 and reference frame list 1, and the motion information includes reference frame index value, motion vector predictor identifier and motion vector difference related information; if the currently used reference frame list and the If the motion information of the matching block that needs to be parsed in the list of reference frames used is determined, first analyze the motion vector predictor identifier of the matching block in the list of reference frames used that is determined, and then parse the list of reference frames used that is determined Matching block motion vector difference related information.

An embodiment of the present invention provides a processing device for inter-frame predictive coding motion information, the device includes: a determination module, configured to determine the currently used reference frame list and the match that needs to be transmitted in the used reference frame list according to the value of the syntax element The motion information of the block, the reference frame list includes at least one of the reference frame list 0 and the reference frame list 1, the motion information includes the reference frame index value, the motion vector predictor identifier and the motion vector difference related information; write module If the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list are determined by the determining module, the motion vector of the matching block in the determined used reference frame list is determined The predictor identifier is written into the code stream prior to the information related to the motion vector difference of the matched block in the determined reference frame list.

An embodiment of the present invention provides a processing device for inter-frame predictive coding motion information, the device includes: a determination module to be parsed, configured to determine the currently used reference frame list and the reference frame list that needs to be parsed according to the value of the syntax element The motion information of the matching block, the reference frame list includes at least one of the reference frame list 0 and the reference frame list 1, and the motion information includes the reference frame index value, the motion vector predictor identifier and the motion vector difference related information; parsing A module, configured to first analyze the motion information of the matching block in the determined used reference frame list if the currently used reference frame list and the motion information of the matching block that needs to be parsed in the used reference frame list are determined by the module to be parsed and determined After the motion vector predictor is identified, the information related to the motion vector difference of the matching block in the determined reference frame list is analyzed.

An embodiment of the present invention provides a codec system, the codec system includes an encoder and a decoder, the encoder includes a determination module and a writing module, and the decoder includes a determination module to be parsed and an analysis module; A determining module, configured to determine the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list according to the value of the syntax element, the reference frame list includes reference frame list 0 and reference frame list 1 At least one, the motion information includes a reference frame index value, a motion vector predictor identifier, and motion vector difference related information; the writing module is used for if the currently used reference frame list and the used reference frame list need to be transmitted The motion information of the matching block is determined by the determining module, and the motion vector predictor identifier of the matching block in the determined list of used reference frames is correlated with the motion vector difference of the matching block in the determined list of used reference frames The information is written into the code stream; the determination module to be parsed is used to determine the currently used reference frame list and the motion information of the matching block that needs to be parsed in the used reference frame list according to the value of the syntax element; the parsing module is used to If the currently used reference frame list and the motion information of the matching block to be parsed in the used reference frame list are determined by the determination module to be parsed, first parse the motion vector of the matching block in the determined used reference frame list After the prediction value is identified, the information related to the motion vector difference of the matched block in the determined reference frame list is analyzed.

It can be seen from the above embodiments of the present invention that since the motion information of the matching block transmitted to the decoder includes the motion vector predictor identifier, and in the transmission process, the motion vector predictor identifier of the matching block in the corresponding reference frame list is preceded by the motion Vector difference related information is written into the code stream. Therefore, compared with the inter-frame predictive encoding motion information processing provided by the prior art, the method provided by the embodiment of the present invention can enable the decoder to obtain the optimal motion vector prediction for the current image block according to the motion vector predictor value identification. value, and the motion vector predictor flag is written into the code stream before the motion vector difference related information, so that the decoder can process these information in parallel, that is, decode according to the parsed motion vector predictor flag while parsing the motion vector difference related information The predicted value of the motion vector is obtained, thereby improving the decoding speed of the code stream at the decoder side.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the prior art or the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiment, for those skilled in the art, other drawings can also be obtained like these drawings.

FIG. 1 is a schematic flowchart of a method for processing inter-frame predictive coding motion information provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a method for processing inter-frame predictive coding motion information provided by another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a processing device for inter-frame predictive coding motion information provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a processing device for inter-frame predictive coding motion information provided by another embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a processing device for inter-frame predictive coding motion information provided by another embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a processing device for inter-frame predictive coding motion information provided by another embodiment of the present invention;

Fig. 7 is a schematic structural diagram of an apparatus for processing inter-frame predictive coding motion information provided by another embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a processing device for inter-frame predictive coding motion information provided by another embodiment of the present invention;

Fig. 9 is a schematic structural diagram of an apparatus for processing inter-frame predictive coding motion information provided by another embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a processing device for inter-frame predictive coding motion information provided by another embodiment of the present invention;

Fig. 11 is a schematic structural diagram of an encoding and decoding system provided by an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

Please refer to FIG. 1 , which is a schematic flow chart of a method for processing inter-frame predictive coding motion information provided by an embodiment of the present invention, and its executor may be an encoder of a communication system using inter-frame predictive coding technology. The method of accompanying drawing 1 example mainly comprises step S101 and step S102:

S101. Determine a currently used reference frame list and motion information of a matching block to be transmitted in the used reference frame list according to a value of a syntax element.

In the embodiment of the present invention, the reference frame list includes at least one of reference frame list 0 (reference list 0) and reference frame list 1 (reference list 1), that is, it may be reference frame list 0, it may be reference frame list 1 or It may be reference frame list 0 and reference frame list 1, and each reference frame list has the same function as the reference frame list mentioned in the background art. Unlike the motion information of the matching block in the reference frame list in the prior art that only needs to include the reference frame index value and the motion vector difference, in the embodiment of the present invention, the motion information of the matching block in the reference frame list includes the reference frame index value and In addition to the motion vector difference, a motion vector predictor flag (indicated by MVP_flag hereinafter) is also included. The motion information of the matching block in the reference frame list includes the motion information of the matching block in the reference frame list 0, the motion information of the matching block in the reference frame list 1, or the motion information of the matching block in the reference frame list 0 and the matching block in the reference frame list 1. The motion information of the block. The motion vector predictor flag (MVP_flag) is used to indicate whether the motion vector predictor selected by the encoder is mvp_0 or mvp_1; when the encoder transmits the motion vector predictor flag to the decoder, it is equivalent to telling the decoder to encode Whether the motion vector predictor selected by the device side during encoding is mvp_0 or mvp_1.

Corresponding to mvp_0 and mvp_1, the motion vector difference (Motion Vector Difference, MVD) of each prediction unit (Prediction Unit, PU) may be obtained from MV-mvp_0 or MV-mvp_1.

It should be noted that, in the embodiment of the present invention, a prediction unit is similar to a motion block in H.264/AVC, that is, a smaller block divided from a macroblock using inter-frame prediction technology; since each such block is Can have its own motion vector, therefore, each prediction unit can also have its own motion vector.

Which reference frame list is currently used by the encoder and the motion information of the matching block in which reference frame list is transmitted is determined according to the value of the syntax element inter_pred_idc in the embodiment of the present invention. Specifically, if the current PU belongs to the bidirectional prediction slice, the syntax element inter_pred_idc is transmitted, and its value can be Pred_L0, Pred_L1 or Pred_BI; further, when the value of inter_pred_idc is Pred_L0, it is determined that the reference frame list 0 is used, and What needs to be transmitted is the motion information of the matching block in the reference frame list 0. When the value of inter_pred_idc is Pred_L1, it is determined that the reference frame list 1 is used, and what needs to be transmitted is the motion information of the matching block in the reference frame list 1; when When the value of inter_pred_idc is Pred_BI, it is determined that reference frame list 0 and reference frame list 1 are used, and what needs to be transmitted is the motion information of the matching block in reference frame list 0 and reference frame list 1. If the current PU does not belong to the bidirectional prediction slice, the syntax element inter_pred_idc is not transmitted, that is, the value of the syntax element inter_pred_idc is Pred_0 by default.

As for determining whether motion information needs to be transmitted, it can be determined according to the prediction mode, that is, if the inter prediction mode of the current PU is not Merge mode, it is determined to transmit motion information, otherwise, the motion information is defaulted.

S102. If the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list are determined, mark the determined motion vector predictor of the matching block in the used reference frame list prior to the The information related to the motion vector difference of the matching blocks in the determined reference frame list is written into the code stream.

If the encoder side determines which reference frame list is currently used and which reference frame list needs to transmit the motion information of the matching block in the reference frame list, it will be used as the reference frame list of the matching block in the determined reference frame list. An embodiment in which the motion vector predictor identifier of the matching block is written into the code stream prior to the motion vector difference related information of the matching block in the determined list of used reference frames may be to first match The reference frame index value of the block is written into the code stream, and then the motion vector predictor identifier of the matching block in the determined list of used reference frames is written into the code stream, and finally the motion vector prediction value of the matching block in the determined list of used reference frames is written Vector difference related information is written into the code stream. Specifically, if the encoder side determines that the current reference frame list 0 is being used and the motion information of the matching block in the reference frame list 0 needs to be transmitted, the motion information sequentially written into the code stream includes the motion information of the matching block in the reference frame list 0. Reference frame index value (represented by ref_idx_l0 below), motion vector predictor flag of matching block in reference frame list 0 (represented by mvp_l0_flag below) and motion vector difference of matching block in reference frame list 0 (represented by mvd_l0 below) ; If the encoder side determines that the reference frame list 1 is currently being used and the motion information of the matching block in the reference frame list 1 needs to be transmitted, then the motion information written into the code stream in turn includes the reference frame of the matching block in the reference frame list 1 Index value (represented by ref_idx_l1 below), motion vector predictor flag of the matching block in reference frame list 1 (represented by mvp_l1_flag below) and motion vector difference of matching block in reference frame list 1 (represented by mvd_l1 below); if The encoder side determines that reference frame list 0 and reference frame list 1 are currently being used, and that what needs to be transmitted is the motion information of matching blocks in reference frame list 0 and reference frame list 1, then the motion information written into the code stream in turn includes reference frames ref_idx_l0, mvp_l0_flag, and mvd_l0 related information of the matching block in list 0, and ref_idx_l1, mvp_l1_flag, and mvd_l1 related information of the matching block in list 1 of the reference frame.

Writing the motion vector predictor identifier of the matched block in the reference frame list of the determined used reference frame list prior to the determined motion vector difference related information of the matched block in the used reference frame list into the code stream In another embodiment, the identifier of the motion vector predictor value of the matched block in the determined used reference frame list may be written into the code stream first, and then the reference frame index value of the determined matched block in the used reference frame list may be written into code stream, and finally write the motion vector difference related information of the matched blocks in the determined reference frame list into the code stream. Specifically, if the encoder side determines that what needs to be transmitted currently is the motion information of the matching block in the reference frame list 0, then the motion information written into the code stream in turn includes mvp_l0_flag, ref_idx_l0 and mvd_l0 related information; if the encoder side determines that the current need to transmit is the motion information of the matching block in reference frame list 1, then the motion information written into the code stream in turn includes mvp_l1_flag, ref_idx_l1 and mvd_l1 related information; if the encoder side determines that the current need to transmit is reference frame list 0 and reference frame list 1 For the motion information of the inner matching block, the motion information written into the code stream in sequence includes mvp_l0_flag, ref_idx_l0, and mvd_l0 related information, and mvp_l1_flag, ref_idx_l1, and mvd_l1 related information.

The above motion information can be transmitted to the decoder in the order in which the code stream is written, that is, the decoder can finally read and analyze the code stream in the order in which the motion information is written in the code stream at the encoder.

The following takes the reference frame list 1 as an example to illustrate the technical solution for transmitting mvd_l0 related information; the technical solution for transmitting mvd_l1 related information is similar to the technical solution for transmitting mvd_l0 related information, and will not be repeated here.

Specifically, mvd_l0 related information includes the flag that the absolute value of the horizontal component of mvd_l0 is greater than 0 (indicated by abs_mvd_greater0_flag[0] below), the flag that the absolute value of the vertical component of mvd_l0 is greater than 0 (indicated by abs_mvd_greater0_flag[1] in the following), the absolute value of the horizontal component of mvd_l0 Flag with a value greater than 1 (indicated by abs_mvd_greater1_flag[0] below), the flag that the absolute value of the vertical component of mvd_l0 is greater than 1 (indicated by abs_mvd_greater1_flag[1] in the following), the amplitude of the absolute value of the horizontal component of mvd_l0 minus 2 (abs_mvd_minus2[0 is used in the following ]), the sign of the horizontal component of mvd_l0 (represented by mvd_sign_flag[0] below), the magnitude of the absolute value of the vertical component of mvd_l0 minus 2 (represented by abs_mvd_minus2[1] below) and the sign of the vertical component of mvd_l0 sign (indicated by mvd_sign_flag[1] below). For abs_mvd_greater1_flag[0], abs_mvd_greater1_flag[1], abs_mvd_minus2[0], mvd_sign_flag[0], abs_mvd_minus2[1] and mvd_sign_flag[1] are all conditional transmissions, that is, if the absolute value of the horizontal component of mvd_l0 is greater than 0, then abs_mvd_greater1_flag is transmitted [0]; if the absolute value of the vertical component of mvd_l0 is greater than 0, transmit abs_mvd_greater1_flag[1]; if the absolute value of the horizontal component of mvd_10 is greater than 1, transmit abs_mvd_minus2[0] and mvd_sign_flag[0]; if the absolute value of the vertical component of mvd_l0 is greater than 1, then transmit abs_mvd_minus2[1] and mvd_sign_flag[1].

It can be known from the above-mentioned processing method of interframe predictive coding motion information provided by the embodiment of the present invention that since the motion information of the matching block transmitted to the decoder includes the motion vector predictor identifier, and in the transmission process, the corresponding reference frame list The motion vector predictor identifier of the matched block is written into the code stream prior to the motion vector difference related information. Therefore, compared with the inter-frame predictive encoding motion information processing provided by the prior art, the method provided by the embodiment of the present invention can enable the decoder to obtain the optimal motion vector prediction for the current image block according to the motion vector predictor value identification. value, and the motion vector predictor flag is written into the code stream before the motion vector difference related information, so that the decoder can process these information in parallel, that is, it can be decoded according to the parsed motion vector predictor flag while analyzing the motion vector difference related information. Motion vector predictors, thereby improving the decoding speed of the code stream at the decoder side.

Please refer to FIG. 2 , which is a schematic flow chart of a method for processing inter-frame predictive coding motion information provided by another embodiment of the present invention, and its execution subject may be a decoder of a communication system adopting inter-frame predictive coding technology. The method illustrated in accompanying drawing 2 mainly includes step S201 and step S02:

S201. Determine the used reference frame list and the motion information of the matching block to be parsed in the used reference frame list according to the value of the syntax element.

Similar to the embodiment of FIG. 1 , in this embodiment, the motion information of the matching block in the reference frame list includes reference frame index value, motion vector difference and motion vector predictor identifier; the motion information of the matching block in the reference frame list includes The motion information of the matching block in the reference frame list 0 (reference list 0) and/or the motion information of the matching block in the reference frame list 1 (reference list 1), that is, including the motion information of the matching block in the reference frame list 0, the reference frame list The motion information of the matching block in 1 or the motion information of the matching block in reference frame list 0 and the motion information of the matching block in reference frame list 1. When the decoder receives the motion vector predictor identifier transmitted from the encoder, the decoder knows whether the motion vector predictor selected by the encoder during encoding is mvp_0 or mvp_1.

Which reference frame list is currently used by the decoder and which motion information of the matching block in the reference frame list needs to be parsed is determined according to the value of the syntax element inter_pred_idc in this embodiment. Specifically, if the current PU belongs to a bidirectional prediction slice, read and parse the syntax element inter_pred_idc, whose value can be Pred_L0, Pred_L1 or Pred_BI; further, when the value of inter_pred_idc is Pred L0, it is determined that the reference frame is used List 0, what needs to be read and parsed is the motion information of the matching block in the reference frame list 0, when the value of inter_pred_idc is Pred_L1, it is determined that the reference frame list 1 is used, and the reference frame list 1 needs to be read and parsed The motion information of the inner matching block; when the value of inter_pred_idc is Pred_BI, it is determined that reference frame list 0 and reference frame list 1 are used, and what needs to be read and parsed is the matching block in reference frame list 0 and reference frame list 1 Sports information. If the current PU does not belong to the bidirectional prediction slice, the syntax element inter_pred_idc is not parsed, that is, the value of the syntax element inter_pred_idc is Pred_0 by default.

As for determining whether to read and analyze the motion information, it can be determined according to the prediction mode, that is, if the inter prediction mode of the current PU is not the Merge mode, it is determined to read and analyze the motion information, otherwise the default motion information.

S202. If the currently used reference frame list and the motion information of the matching block to be parsed in the used reference frame list are determined, first analyze the motion vector predictor identifier of the matching block in the determined used reference frame list, and then parse the Information related to the motion vector difference of the matching blocks in the reference frame list determined above.

If the decoder side determines which reference frame list is currently used and which reference frame list needs to be parsed for the motion information of the matching block in the reference frame list, it is used as the first analysis of the motion vector prediction of the matching block in the reference frame list used An embodiment of analyzing the motion vector difference related information of the matching block in the determined list of used reference frames after the value identification may be to sequentially read and analyze the reference frames of the matching blocks in the determined list of used reference frames in the code stream Index value, motion vector predictor identification and motion vector difference related information. Specifically, if the decoder determines that it is currently using reference frame list 0 and what needs to be parsed is the motion information of the matching block in reference frame list 0, it will sequentially read and parse the references of the matching blocks in reference frame list 0 in the code stream. Frame index value (represented by ref_idx_l0 below), motion vector predictor flag of matching block in reference frame list 0 (represented by mvp_l0_flag below) and motion vector difference of matching block in reference frame list 0 (represented by mvd_l0 below); If the decoder determines that it is currently using reference frame list 1 and what needs to be parsed is the motion information of the matching block in reference frame list 1, it will sequentially read and parse the reference frame index value of the matching block in reference frame list 1 in the code stream (represented by ref_idx_l1 below), the motion vector predictor flag of the matching block in reference frame list 1 (represented by mvp_l1_flag below), and the motion vector difference of the matching block in reference frame list 1 (represented by mvd_l1 below); if the decoder If the terminal determines that reference frame list 0 and reference frame list 1 are currently being used and that the motion information of matching blocks in reference frame list 0 and reference frame list 1 needs to be parsed, then read and parse ref_idx_l0, mvp_l0_flag, and mvd_l0 in the code stream in sequence Related information, and ref_idx_l1, mvp_l1_flag, and mvd_l1 related information.

As another embodiment of analyzing the motion vector difference related information of the matching blocks in the determined reference frame list after analyzing the motion vector predictor identifier of the matching block in the determined reference frame list used, it may be Read the motion vector predictor identifier, reference frame index value and motion vector difference related information of the matching block in the reference frame list determined in the code stream in sequence. Specifically, if the decoder determines that it is currently using reference frame list 0 and what needs to be parsed is the motion information of the matching block in reference frame list 0, it will sequentially read and parse the information related to mvp_l0_flag, ref_idx_l0, and mvd_l0 in the code stream; if The decoder side determines that it is currently using the reference frame list 1 and needs to analyze the motion information of the matching block in the reference frame list 1, then reads and parses the relevant information of mvpv_l1_flag, ref_idx_l1 and mvd_l1 in the code stream in sequence; if the decoder side determines Currently, reference frame list 0 and reference frame list 1 are used, and what needs to be parsed is the motion information of matching blocks in reference frame list 0 and reference frame list 1, then read and parse the relevant information of mvp_l0_flag, ref_idx_l0 and mvd_l0 in the code stream in sequence , and information related to mvp_l1_flag, ref_idx_l1, and mvd_l1. The following takes the reference frame list 0 as an example to illustrate the technical solution for the decoder to parse mvdl_0; the technical solution for the decoder to parse mvd_l1-related information is similar to the technical solution for parsing mvd_l0-related information, and will not be described in detail.

Specifically, in this embodiment, mvd_l0 related information includes the flag that the absolute value of the horizontal component of mvd_l0 is greater than 0 (indicated by abs_mvd_greater0_flag[0] below), the flag that the absolute value of the vertical component of mvd_l0 is greater than 0 (indicated by abs_mvd_greater0_flag[1] in the following ), the absolute value of the mvd_l0 horizontal component is greater than 1 (indicated by abs_mvd_greater1_flag[0] below), the absolute value of the mvd_l0 vertical component is greater than 1 (indicated by abs_mvd_greater1_flag[1] in the following), the amplitude of the absolute value of the mvd_l0 horizontal component minus 2 (hereinafter expressed by abs_mvd_minus2[0]), the sign of the horizontal component of mvd_l0 (hereinafter expressed by mvd_sign_flag[0]), the amplitude of the absolute value of the vertical component of mvd_l0 minus 2 (hereinafter expressed by abs_mvd_minus2[1]) and mvd_l0 The sign of the vertical component (indicated by mvd_sign_flag[1] below). For abs_mvd_greater1_flag[0], abs_mvd_greater1_flag[1], abs_mvd_minus2[0], mvd_sign_flag[0], abs_mvd_minus2[1] and mvd_sign_flag[1] are conditional analysis, that is, if the absolute value of the horizontal component of mvd_l0 is greater than 0, the decoder Read and parse abs_mvd_greater1_flag[0]; if the absolute value of the vertical component of mvd_l0 is greater than 0, the decoder reads and parses abs_mvd_greater1_flag[1]; if the absolute value of the horizontal component of mvd_l0 is greater than 1, the decoder reads and parses abs_mvd_minus2[0 ] and mvd_sign_flag[0]; if the absolute value of the vertical component of mvd_l0 is greater than 1, the decoder reads and parses abs_mvd_minus2[1] and mvd_sign_flag[1].

For the processing method of inter-frame predictive encoding motion information illustrated in Figure 2, since the position of the motion vector predictor identifier in the code stream is prior to the motion vector difference related information, the decoder can first parse out the motion vector predictor identifier , and then parse the motion vector difference related information. Compared with the scheme of first analyzing the motion vector difference-related information, and then analyzing the motion vector predictor value identification after analyzing the motion vector difference-related information, the processing method of the inter-frame predictive coding motion information illustrated in Figure 2 enables the decoder to decode The speed is greatly accelerated, which is conducive to its parallel processing. This is because the motion vector difference-related information is more complicated than the motion vector predictor identifier. Assume that the time spent on parsing information related to the motion vector difference is T ₁ , and the time spent on decoding the motion vector predictor is T ₂ . If the scheme of analyzing the information related to the motion vector difference first, and then analyzing the identifier of the motion vector predictor value after the completion of the analysis of the information related to the motion vector difference, and then decoding the motion vector predictor value (MVP) according to the identifier of the analyzed motion vector predictor value, then The total time spent on parsing the motion vector difference related information and decoding the motion vector predictor is the sum of the two times, that is, T ₁ +T ₂ . If the motion vector predictor identifier is analyzed first, after the motion vector predictor identifier is analyzed, the information related to the motion vector difference is analyzed, and then, while the information related to the motion vector difference is analyzed, it is decoded according to the already resolved motion vector predictor identifier motion vector predictor value, then the total time spent on parsing motion vector difference related information and decoding motion vector predictor value is max(T ₁ , T ₂ ), which is the maximum value of the two. Obviously, max(T ₁ , T ₂ ) requires smaller than T ₁ +T ₂ .

In the method illustrated in FIG. 2 , after first parsing the motion vector predictor identifier of the matching block in the corresponding reference frame list, and then parsing the motion vector difference related information, it further includes: determining the matching block according to the reference frame index value The reference frame where it is located; reconstructing the motion vector of the matching block in the corresponding reference frame list; obtaining the current inter prediction unit according to the determined reference frame where the matching block is located and the reconstructed motion vector of the matching block in the corresponding reference frame list Matching blocks within the list of corresponding reference frames.

Take the reference frame list 0 selected by the decoder as an example (similar to selecting reference frame list 1, so I won’t go into details), when reconstructing the motion vector of the matching block in the corresponding reference frame list, the details can be:

S1. Recover the determined motion vector difference of the matched block in the used reference frame list according to the determined related information of the motion vector difference of the matched block in the used reference frame list; specifically, the motion vector of the matched block in the reference frame list 0 Difference (mvd_l0) related information includes mvd_l0 horizontal component (represented by mvd_x below) and mvd_l0 vertical component (represented by mvd_y below), wherein mvd_x can be calculated as follows:

mvd_x=abs_mvd_greater0_flag[0]*(abs_mvd_minus2[0]+2)*(1-2*mvd_sign_flag[0]);

mvd_y can be calculated as follows:

mvd_y=abs_mvd_greater0_flag[1]*(abs_mvd_minus2[1]+2)*(1-2*mvd_sign_flag[1]);

In the above expressions of mvd_x and mvd_y, the meanings of abs_mvd_greater0_flag[0], abs_mvd_minus2[0], mvd_sign_flag[0], abs_mvd_greater0_flag[1], abs_mvd_minus2[1] and abs_mvd_minus2[1] can be referred to the previous embodiment, which will not be done here repeat.

S2. Determine the motion vector predictor of the current inter prediction unit (PU) according to the determined motion vector predictor identifier of the matched block in the reference frame list used in the reference frame list;

S3. Add the restored motion vector difference to the determined motion vector predictor of the current inter prediction unit to obtain a motion vector corresponding to a matching block in the reference frame list.

When reconstructing the current image block, only the matching blocks in one list can be used, or the weighted matching blocks obtained by weighting the matching blocks in the two lists can be used. The specific selection of the list to be used is indicated by the corresponding syntax element in the code stream; the reconstructed current image block is obtained by adding the image prediction residual block and the (weighted) matching block.

Please refer to FIG. 3 , which is a schematic structural diagram of an apparatus for processing inter-frame predictive coding motion information provided by an embodiment of the present invention. For ease of description, only parts related to the embodiments of the present invention are shown. The apparatus for processing motion information of inter-frame predictive coding illustrated in FIG. 3 may be an encoder of a communication system using inter-frame predictive coding technology. The processing device for inter-frame predictive coding motion information illustrated in FIG. 3 includes a determination module 301 and a writing module 302, wherein:

The determining module 301 is configured to determine the currently used reference frame list and the motion information of the matching block that needs to be transmitted in the used reference frame list that needs to be transmitted according to the value of the syntax element.

In this embodiment, the reference frame list includes at least one of reference frame list 0 (reference list 0) and reference frame list 1 (reference list 1), that is, it may be reference frame list 0, it may be reference frame list 1, or it may be are reference frame list 0 and reference frame list 1, and the function of each reference frame list is the same as that of the reference frame list mentioned in the foregoing embodiments or background art. The motion information of the matching block in the reference frame list includes not only the reference frame index value and the motion vector difference, but also a motion vector predictor flag (indicated by MVP_flag hereinafter). The motion information of the matching block in the reference frame list includes the motion information of the matching block in the reference frame list 0 (reference list 0) and/or the motion information of the matching block in the reference frame list 1 (reference list 1), that is, including the reference frame list 0 The motion information of the inner matching block, the motion information of the matching block in the reference frame list 1 or the motion information of the matching block in the reference frame list 0 and the motion information of the matching block in the reference frame list 1. The motion vector predictor flag (MVP_flag) is used to indicate whether the motion vector predictor selected by the encoder is mvp_0 or mvp_1; when the encoder transmits the motion vector predictor flag to the decoder, it is equivalent to telling the decoder to encode Whether the motion vector predictor selected by the device side during encoding is mvp_0 or mvp_1.

Specifically, if the current PU belongs to a bidirectional prediction slice, the syntax element inter_pred_idc is transmitted, and its value can be Pred_L0, Pred_L1 or Pred_BI; further, when the value of inter_pred_idc is Pred_L0, the determination module 301 determines that the reference frame list is used 0, and what needs to be transmitted is the motion information of the matching block in the reference frame list 0. When the value of inter_pred_idc is Pred_L1, the determination module 301 determines that the reference frame list 1 is used, and what needs to be transmitted is the matching block in the reference frame list 1. The motion information of the block; when the value of inter_pred_idc is Pred_BI, the determination module 301 determines that reference frame list 0 and reference frame list 1 are used, and what needs to be transmitted is the motion of the matching block in reference frame list 0 and reference frame list 1 information. If the current PU does not belong to the bidirectional prediction slice, the syntax element inter_pred_idc is not transmitted, that is, the value of the syntax element inter_pred_idc is Pred_0 by default.

Writing module 302, for if the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list are determined by the determining module 301, then the matching block in the determined used reference frame list The motion vector predictor identifier is written into the code stream prior to the determination of the motion vector difference related information of the matching block in the used reference frame list.

Taking reference frame list 1 as an example, the technical solution for transmitting mvd_l0-related information is described; the technical solution for transmitting mvd_l1-related information is similar to the technical solution for transmitting mvd_l0-related information, and details are not repeated here.

Specifically, mvd_l0 related information includes the flag that the absolute value of the horizontal component of mvd_l0 is greater than 0 (indicated by abs_mvd_greater0_flag[0] below), the flag that the absolute value of the vertical component of mvd_l0 is greater than 0 (indicated by abs_mvd_greater0_flag[1] in the following), the absolute value of the horizontal component of mvd_l0 Flag with a value greater than 1 (indicated by abs_mvd_greater1_flag[0] below), the flag that the absolute value of the vertical component of mvd_l0 is greater than 1 (indicated by abs_mvd_greater1_flag[1] in the following), the amplitude of the absolute value of the horizontal component of mvd_l0 minus 2 (abs_mvd_minus2[0 is used in the following ]), the sign of the horizontal component of mvd_l0 (represented by mvd_sign_flag[0] below), the magnitude of the absolute value of the vertical component of mvd_l0 minus 2 (represented by abs_mvd_minus2[1] below) and the sign of the vertical component of mvd_l0 sign (indicated by mvd_sign_flag[1] below). For abs_mvd_greater1_flag[0], abs_mvd_greater1_flag[1], abs_mvd_minus2[0], mvd_sign_flag[0], abs_mvd_minus2[1] and mvd_sign_flag[1] are all conditional transmissions, that is, if the absolute value of the horizontal component of mvd_l0 is greater than 0, then abs_mvd_greater1_flag is transmitted [0]; if the absolute value of the vertical component of mvd_l0 is greater than 0, transmit abs_mvd_greater1_flag[1]; if the absolute value of the horizontal component of mvd_10 is greater than 1, transmit abs_mvd_minus2[0] and mvd_sign_flag[0]; if the absolute value of the vertical component of mvd_l0 is greater than 1, then transmit abs_mvd_minus2[1] and mvd_sign_flag[1].

It should be noted that, in the above embodiment of the processing device for inter-frame predictive coding motion information, the division of each functional module is only an example, and in actual application, it can be considered according to the needs, such as the configuration requirements of corresponding hardware or the convenience of software implementation. , and the above function allocation is completed by different functional modules, that is, the internal structure of the inter-frame predictive coding motion information processing device is divided into different functional modules, so as to complete all or part of the functions described above. Moreover, in practical applications, the corresponding functional modules in this embodiment may be implemented by corresponding hardware, or may be completed by corresponding hardware executing corresponding software. The value of the hardware used to determine the reference frame list currently used and the motion information to be transmitted in the used reference frame list, such as a determiner, can also be a general processor or other hardware device capable of executing a corresponding computer program to complete the aforementioned functions; Another example is the above-mentioned transmission module, which may be capable of executing the above-mentioned If the motion information of the currently used reference frame list and the matching block that needs to be transmitted in the used reference frame list is determined by the determination module (or determiner), then the The determined motion vector predictor identifier of the matching block in the used reference frame list is written into the code stream function related information before the determined motion vector difference related information of the matched block in the used reference frame list, such as a transmitter, may also be able to A general processor or other hardware device that executes a corresponding computer program to complete the foregoing functions (the foregoing description principles can be applied to each of the embodiments provided in this specification).

The writing module 302 illustrated in FIG. 3 may include a first writing unit 401 , as shown in FIG. 4 , which is an apparatus for processing inter-frame predictive coding motion information provided by another embodiment of the present invention. The first writing unit 401 is configured to first write the reference frame index value of the matching block in the determined used reference frame list into the code stream, and then predict the motion vector of the matching block in the determined used reference frame list The value identifier is written into the code stream, and finally the information related to the motion vector difference of the matching block in the determined reference frame list is written into the code stream.

The transmission module 302 illustrated in FIG. 3 may include a second writing unit 501, as shown in FIG. 5, which is an apparatus for processing inter-frame predictive coding motion information provided by another embodiment of the present invention. The second writing unit 501 is configured to first write the motion vector predictor identifier of the matched block in the determined used reference frame list into the code stream, and then write the determined reference frame index value of the matched block in the used reference frame list Write into the code stream, and finally write the information related to the motion vector difference of the matching block in the determined reference frame list into the code stream.

Please refer to FIG. 6 , which is a schematic structural diagram of an apparatus for processing inter-frame predictive coding motion information provided by another embodiment of the present invention. For ease of description, only parts related to the embodiments of the present invention are shown. The apparatus for processing inter-frame predictive coding motion information illustrated in FIG. 6 may be a decoder of a communication system using inter-frame predictive coding technology. The processing device for inter-frame predictive coding motion information illustrated in FIG. 6 includes a determination module 601 to be analyzed and an analysis module 602, wherein:

The to-be-parsed determining module 601 is configured to determine the currently used reference frame list and the motion information of the matching block that needs to be parsed in the used reference frame list according to the value of the syntax element, and the reference frame list includes reference frame list 0 and reference frame list At least one of 1, the motion information includes a reference frame index value, a motion vector predictor identifier, and motion vector difference related information.

The parsing module 602 is configured to first parse the determined reference frame list in use if the currently used reference frame list and the motion information of the matching block to be parsed in the used reference frame list are determined by the to-be-parsed determination module 601 After the motion vector predictor of the matching block is identified, the information related to the motion vector difference of the matching block in the determined reference frame list used is analyzed.

It should be noted that, in the above embodiment of the processing device for inter-frame predictive coding motion information, the division of each functional module is only an example, and in actual application, it can be considered according to the needs, such as the configuration requirements of corresponding hardware or the convenience of software implementation. , and the above function allocation is completed by different functional modules, that is, the internal structure of the inter-frame predictive coding motion information processing device is divided into different functional modules, so as to complete all or part of the functions described above. Moreover, in practical applications, the corresponding functional modules in this embodiment may be realized by corresponding hardware, or may be completed by corresponding software executed by corresponding hardware. The value of the syntax element determines the currently used reference frame list and the hardware of the motion information of the matching block in the used reference frame list that needs to be parsed, such as a determiner to be parsed, or a general process capable of executing a corresponding computer program to complete the aforementioned functions device or other hardware devices; as the aforementioned parsing module, it may be executed by the module to be parsed (or the motion information of the matching block that needs to be parsed in the list of reference frames that are currently used and the list of reference frames used) If determined by the analysis determiner), first analyze the motion vector predictor identifier of the matching block in the determined reference frame list used, and then analyze the motion vector difference related information function The hardware, such as a parser, may also be a general processor or other hardware device capable of executing corresponding computer programs to complete the aforementioned functions (the above description principles can be applied to each embodiment provided in this specification).

The parsing module 602 illustrated in FIG. 6 may include a first extracting unit 701 , as shown in FIG. 7 , an apparatus for processing motion information of inter-frame predictive coding provided by another embodiment of the present invention. The first extracting unit 701 is configured to sequentially read and analyze the reference frame index value, motion vector predictor identifier and motion vector difference related information of the matching block in the determined reference frame list in the code stream.

The parsing module 602 illustrated in FIG. 6 may also include a second extracting unit 801 , as shown in FIG. 8 , an apparatus for processing inter-frame predictive coding motion information provided by another embodiment of the present invention. The second extracting unit 801 is configured to sequentially read and analyze the motion vector predictor identifier, reference frame index value and motion vector difference related information of the matching block in the determined reference frame list in the code stream.

The device for processing inter-frame predictive coding motion information illustrated in FIG. 6 may also include a reference frame determination module 901, a reconstruction module 902, and an acquisition module 903. As shown in FIG. 9, another embodiment of the present invention provides an inter-frame predictive coding motion information Information processing means, in which:

A reference frame determining module 901, configured to determine the reference frame where the matching block is located according to the reference frame index value;

A reconstruction module 902, configured to reconstruct the motion vector of the matching block in the determined list of used reference frames;

The obtaining module 903 is configured to obtain the matching block of the current inter-frame prediction unit in the determined used reference frame list according to the determined reference frame where the matching block is located and the reconstructed motion vector.

The reconstruction module 902 illustrated in FIG. 9 may include a motion vector difference recovery unit 1001, a motion vector predictor determination unit 1002, and a summation unit 1003. As shown in FIG. 10, another embodiment of the present invention provides inter-frame predictive coding motion information processing device, in which:

A motion vector difference recovery unit 1001, configured to recover the determined motion vector difference of the matched blocks in the used reference frame list according to the determined motion vector difference related information of the matched blocks in the used reference frame list;

Taking the reference frame list 0 as an example, the related information of the motion vector difference (mvd_l0) of the matching block in the reference frame list 0 includes the mvd_l0 horizontal component (mvd_x) and the mvd_l0 vertical component (mvd_y), and the motion vector difference recovery unit 1001 can operate in the following manner Calculate mvd_x:

mvd_x=abs_mvd_greater0_flag[0]*(abs_mvd_minus2[0]+2)*(1-2*mvd_sign_flag[0]);

The motion vector difference recovery unit 1001 can calculate mvd_y as follows:

mvd_y=abs_mvd_greater0_flag[1]*(abs_mvd_minus2[1]+2)*(1-2*mvd_sign_flag[1]);

In the above expressions of mvd_x and mvd_y, the meanings of abs_mvd_greater0_flag[0], abs_mvd_minus2[0], mvd_sign_flag[0], abs_mvd_greater0_flag[1], abs_mvd_minus2[1] and abs_mvd_minus2[1] can be referred to the previous embodiment, which will not be done here repeat.

A motion vector predictor determining unit 1002, configured to determine the motion vector predictor of the current inter prediction unit according to the determined motion vector predictor identifier of the matched block in the reference frame list;

A summation unit 1003, configured to add the motion vector difference of the matched block in the restored reference frame list to the determined motion vector predictor of the current inter prediction unit to obtain the motion of the matched block in the corresponding reference frame list vector.

Please refer to FIG. 11 , which is a schematic structural diagram of a codec system provided by an embodiment of the present invention. For ease of description, only parts related to the embodiments of the present invention are shown. The codec system illustrated in Figure 11 includes the encoder 111 provided in any one of the embodiments of Figures 3 to 5 and the decoder 112 provided in any of the embodiments of Figures 6 to 10, wherein the encoder 111 includes a determination Module 1111 and transmission module 1112, the decoder 112 includes a decoder including a determination module 1121 to be parsed and a parsing module 1122, wherein:

A determining module 1111, configured to determine the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list according to the value of the syntax element, the reference frame list includes reference frame list 0 and reference frame list 1 At least one of the above, the motion information includes a reference frame index value, a motion vector predictor identifier, and motion vector difference related information;

The transmission module 1112 is configured to: if the currently used reference frame list and the motion information of the matching block that needs to be transmitted in the used reference frame list are determined by the determination module 1111, then transfer the motion information of the matching block in the determined used reference frame list The motion vector predictor identifier is written into the code stream prior to the motion vector difference related information of the matching block in the determined reference frame list;

The to-be-parsed determination module 1121 is configured to determine the currently used reference frame list and the motion information of the matching block that needs to be parsed in the used reference frame list according to the value of the syntax element;

The parsing module 1122 is configured to first parse the determined reference frame list in use if the currently used reference frame list and the motion information of the matching block to be parsed in the used reference frame list are determined by the to-be-parsed determination module 1121 After the motion vector predictor of the matching block is identified, the information related to the motion vector difference of the matching block in the determined reference frame list used is analyzed.

It should be noted that the information interaction and execution process between the modules/units of the above-mentioned device are based on the same idea as the method embodiment of the present invention, and the technical effect it brings is the same as that of the method embodiment of the present invention. The specific content can be Refer to the descriptions in the method embodiments of the present invention, and details are not repeated here.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, such as one or more or all of the following various methods:

Method 1: Determine the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list according to the value of the syntax element, the reference frame list includes at least one of reference frame list 0 and reference frame list 1 , the motion information includes a reference frame index value, a motion vector predictor identifier, and motion vector difference related information;

If the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list are determined, the determined motion vector predictor of the matching block in the used reference frame list is identified prior to the determined The motion vector difference related information of the matching blocks in the reference frame list used is written into the code stream.

Method 2: Determine the currently used reference frame list and the motion information of the matching block to be parsed in the used reference frame list according to the value of the syntax element, the reference frame list includes at least one of reference frame list 0 and reference frame list 1 , the motion information includes a reference frame index value, a motion vector predictor identifier, and motion vector difference related information;

If the currently used reference frame list and the motion information of the matching block to be resolved in the used reference frame list are determined, first analyze the motion vector predictor identifier of the matching block in the determined used reference frame list and then analyze the determination Information about the motion vector difference of the matching blocks in the list of reference frames used.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: Read Only Memory (ROM, Read Only Memory), Random Access Memory (RAM, Random Access Memory), disk or CD, etc.

The above is a detailed introduction to the processing method, device and codec system of inter-frame predictive coding motion information provided by the embodiment of the present invention. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments It is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, The contents of this description should not be construed as limiting the present invention.

Claims (17)

1. A processing method for interframe predictive coding motion information, characterized in that the method comprises: Determine the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list according to the value of the syntax element, the reference frame list includes at least one of reference frame list 0 and reference frame list 1, the Motion information includes reference frame index value, motion vector predictor identifier and motion vector difference related information; If the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list are determined, the determined motion vector predictor of the matching block in the used reference frame list is identified prior to the determined Write the information about the motion vector difference of the matched block in the reference frame list into the code stream; Wherein, the motion vector predictor identifier is used to indicate whether the motion vector predictor selected by the execution subject of the processing method is mvp_0 or mvp_1; the motion vector difference is obtained by subtracting the mvp_0 from MV or subtracting the mvp_1 from MV , the MV is the motion vector of the current block and the matching block. 2. The method of claim 1, wherein said identifying a motion vector predictor of a matching block in said determined list of used reference frames precedes a motion vector predictor of a matching block in said determined list of used reference frames Vector difference related information written into the code stream includes: First write the reference frame index value of the matching block in the determined list of used reference frames into the code stream, then write the identifier of the motion vector predictor value of the matching block in the determined reference frame list into the code stream, and finally write the The motion vector difference related information of the matched blocks in the reference frame list determined above is written into the code stream. 3. The method of claim 1, wherein said identifying a motion vector predictor of a matching block in said determined list of used reference frames precedes a motion vector predictor of a matching block in said determined list of used reference frames Vector difference related information written into the code stream includes: First write the motion vector predictor identifier of the matching block in the determined list of used reference frames into the code stream, then write the reference frame index value of the matching block in the determined list of used reference frames into the code stream, and finally write the The motion vector difference related information of the matched blocks in the reference frame list determined above is written into the code stream. 4. A processing method for interframe predictive coding motion information, characterized in that the method comprises: Determine the currently used reference frame list and the motion information of the matching block that needs to be parsed in the used reference frame list according to the value of the syntax element, the reference frame list includes at least one of reference frame list 0 and reference frame list 1, the Motion information includes reference frame index value, motion vector predictor identifier and motion vector difference related information; If the currently used reference frame list and the motion information of the matching block to be resolved in the used reference frame list are determined, first analyze the motion vector predictor identifier of the matching block in the determined used reference frame list and then analyze the determination Information about the motion vector difference of the matching block in the used reference frame list; Wherein, the motion vector predictor identifier is used to indicate that the execution subject of the processing method knows whether the motion vector predictor selected by the encoder during encoding is mvp_0 or mvp_1 when receiving the motion vector predictor identifier transmitted from the encoder ; The motion vector difference is obtained by subtracting the mvp_0 or mvp_1 from the MV, and the MV is the motion vectors of the current block and the matching block. 5. The method according to claim 4, wherein parsing the determined motion vector difference related information of the determined used reference frame list after first analyzing the motion vector predictor identification of the matched block in the reference frame list includes: Reading and parsing in sequence the reference frame index value, motion vector predictor identifier, and motion vector difference related information of the matching block in the determined reference frame list used in the code stream. 6. The method according to claim 4, wherein parsing the determined motion vector difference related information of the determined used reference frame list firstly includes: Reading and parsing the motion vector predictor identification, reference frame index value and motion vector difference related information of the matching block in the determined reference frame list in the code stream in sequence. 7. The method according to claim 4, characterized in that the step of parsing the motion vector difference related information of the determined used reference frame list first after analyzing the identifier of the motion vector predictor of the matching block in the reference frame list used Afterwards, described method further comprises: Determine the reference frame where the matching block is located according to the reference frame index value; reconstructing motion vectors for matching blocks within said determined list of used reference frames; According to the determined reference frame where the matching block is located and the motion vector of the matching block in the reconstructed reference frame list, the matching block of the current inter-frame prediction unit in the corresponding reference frame list is acquired. 8. The method according to claim 7, wherein said rebuilding the motion vector corresponding to the matching block in the reference frame list comprises: Restoring the determined motion vector difference of the matched block in the used reference frame list according to the related information of the determined motion vector difference of the matched block in the used reference frame list; determining the motion vector predictor of the current inter prediction unit according to the motion vector predictor identifier of the matching block in the determined reference frame list; Adding the motion vector difference of the matched block in the restored reference frame list to the determined motion vector predictor of the current inter prediction unit to obtain the determined motion vector of the matched block in the used reference frame list. 9. A processing device for inter-frame predictive coding motion information, characterized in that the device comprises: A determining module, configured to determine the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list according to the value of the syntax element, the reference frame list includes reference frame list 0 and reference frame list 1 At least one, the motion information includes reference frame index value, motion vector predictor identifier and motion vector difference related information; A writing module, for if the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list are determined by the determining module, then the motion information of the matching block in the determined used reference frame list is determined. The vector predictor identifier is written into the code stream prior to the motion vector difference related information of the matching block in the determined reference frame list; Wherein, the motion vector predictor identifier is used to indicate whether the motion vector predictor selected by the processing device is mvp_0 or mvp_1; the motion vector difference is obtained by subtracting the mvp_0 or mvp_1 from the MV, and the MV are the motion vectors of the current block and the matching block. 10. The device according to claim 9, wherein the writing module comprises: The first writing unit is configured to first write the reference frame index value of the matched block in the determined used reference frame list into the code stream, and then identify the motion vector predictor value of the matched block in the determined used reference frame list Write into the code stream, and finally write the information related to the motion vector difference of the matching block in the determined reference frame list into the code stream. 11. The device according to claim 9, wherein the writing module comprises: The second writing unit is configured to first write the motion vector predictor identifier of the matched block in the determined used reference frame list into the code stream, and then write the determined reference frame index value of the matched block in the used reference frame list Write into the code stream, and finally write the information related to the motion vector difference of the matching block in the determined reference frame list into the code stream. 12. A processing device for inter-frame predictive coding motion information, characterized in that the device comprises: A determination module to be parsed, configured to determine the currently used reference frame list and the motion information of the matching block to be parsed in the used reference frame list according to the value of the syntax element, the reference frame list includes reference frame list 0 and reference frame list 1 At least one of the above, the motion information includes reference frame index value, motion vector predictor identifier and motion vector difference related information; An analysis module, configured to first analyze the determined matching block in the list of reference frames used if the motion information of the currently used reference frame list and the matching block to be analyzed in the used reference frame list is determined by the determination module to be analyzed After identifying the motion vector predictor value, analyze the motion vector difference related information of the matching block in the reference frame list used for the determination; Wherein, the motion vector predictor flag is used to indicate that the processing device knows whether the motion vector predictor selected by the encoder during encoding is mvp_0 or mvp_1 when receiving the motion vector predictor flag transmitted from the encoder; The motion vector difference is obtained by subtracting the mvp_0 or mvp_1 from the MV, and the MV is the motion vectors of the current block and the matching block. 13. The device according to claim 12, wherein the parsing module comprises: The first extracting unit is used to sequentially read and analyze the reference frame index value, motion vector predictor identifier and motion vector difference related information of the matching block in the determined reference frame list in the code stream. 14. The device according to claim 12, wherein the parsing module comprises: The second extracting unit is used to sequentially read and analyze the motion vector predictor identification, reference frame index value and motion vector difference related information of the matching block in the determined reference frame list in the code stream. 15. The device of claim 12, further comprising: A reference frame determination module, configured to determine the reference frame where the matching block is located according to the reference frame index value; a reconstruction module for reconstructing motion vectors of matching blocks within said determined list of used reference frames; An acquisition module, configured to acquire the matching block of the current inter-frame prediction unit in the corresponding reference frame list according to the determined reference frame where the matching block is located and the motion vector of the matching block in the reconstructed reference frame list. 16. The apparatus of claim 15, wherein the reconstruction module comprises: A motion vector difference recovery unit, configured to recover the determined motion vector difference of the matched blocks in the used reference frame list according to the determined motion vector difference related information of the matched blocks in the used reference frame list; A motion vector predictor determining unit, configured to determine the motion vector predictor of the current inter prediction unit according to the determined motion vector predictor identification of the matched block in the reference frame list; A summation unit, configured to add the motion vector difference of the matched block in the restored reference frame list to the determined motion vector predictor of the current inter prediction unit to obtain the determined matching block in the reference frame list used The block's motion vector. 17. A codec system, characterized in that the codec system includes an encoder and a decoder, the encoder includes a determination module and a writing module, and the decoder includes a determination module to be analyzed and an analysis module; The determining module is configured to determine the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list according to the value of the syntax element, the reference frame list includes reference frame list 0 and reference frame list 1 At least one of the above, the motion information includes reference frame index value, motion vector predictor identifier and motion vector difference related information; The writing module is configured to: if the currently used reference frame list and the motion information of the matching block to be transmitted in the used reference frame list are determined by the determining module, write the matching block in the determined used reference frame list The motion vector predictor identifier is written into the code stream prior to the motion vector difference related information of the matching block in the determined reference frame list; The determination module to be parsed is configured to determine the currently used reference frame list and the motion information of the matching block that needs to be parsed in the used reference frame list according to the value of the syntax element; The parsing module is configured to, if the motion information of the currently used reference frame list and the matching block that needs to be parsed in the used reference frame list is determined by the to-be-parsed determination module, first parse the determined used reference frame list After identifying the motion vector predictor of the matching block, parsing the information related to the motion vector difference of the matching block in the determined list of used reference frames; Wherein, the motion vector predictor identifier is used to indicate whether the motion vector predictor selected by the encoder is mvp_0 or mvp_1; the motion vector difference is obtained by subtracting the mvp_0 from the MV or subtracting the mvp_1 from the MV, and the MV are the motion vectors of the current block and the matching block.